MESON Chess Problem Database

Problem Display
PID: 17971 (1QK5/7B/2p5/2R4p/3kNpn1/4N3/2Prr1pb/3n1b2 w - - 0 1)

Kapralos, Demetrius N

HM., Olympic Ty., 1952

1QK5/7B/2p5/2R4p/3kNpn1/4N3/2Prr1pb/3n1b2

#2

7 + 11

3105 FIDE Album (1945-1955) 1964
273 Mat Plus 1994

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe3
      • 2.Qd6#
    • 1...Sdxe3
      • 2.Qb2#
    • 1...Sgxe3
      • 2.Qe5#
    • 1...fxe3
      • 2.Qb4#
  • Tries
    • 1.Sxd1?
      • threat
        • 2.Qd6#
        • 2.Qb2#
        • 2.Qb4#
      • 1...Rxc2
        • 2.Qd6#
      • 1...Rxe4
        • 2.Qd6#
      • 1...Rd3
        • 2.Qd6#
        • 2.Qb4#
      • 1...Re1
        • 2.Qd6#
        • 2.Qb2#
      • 1...Rf2
        • 2.Qd6#
        • 2.Qb2#
      • 1...Re3
        • 2.Qd6#
      • 1...Se3
        • 2.Qe5#
        • 2.Qb2#
      • 1...Se5
        • 2.Qxe5#
        • 2.Qd6#
        • 2.Qb2#
      • 1...Sf6
        • 2.Qe5#
        • 2.Qb2#
        • 2.Qb4#
      • 1...f3
        • 2.Qb2#
        • 2.Qb4#
      • 1...Rxd1!
    • 1.Sxg4?
      • threat
        • 2.Qe5#
        • 2.Qd6#
        • 2.Qb4#
      • 1...Rxc2
        • 2.Qd6#
      • 1...Rxe4
        • 2.Qd6#
      • 1...Re1
        • 2.Qe5#
        • 2.Qd6#
      • 1...Rf2
        • 2.Qe5#
        • 2.Qd6#
      • 1...Re3
        • 2.Qe5#
        • 2.Qd6#
      • 1...Sb2
        • 2.Qe5#
        • 2.Qd6#
        • 2.Qxb2#
      • 1...Sc3
        • 2.Qe5#
        • 2.Qb4#
      • 1...Se3
        • 2.Qe5#
        • 2.Qb2#
      • 1...f3
        • 2.Qb4#
      • 1...hxg4!
    • 1.Qb6?
      • threat
        • 2.Rd5#
      • 1...Kxe3
        • 2.Rc3#
      • 1...Rxe3
        • 2.Qd8#
      • 1...Sdxe3
        • 2.Qb2#
      • 1...fxe3
        • 2.Qb4#
      • 1...Sgxe3!
  • Keys
    • 1.Qa7!
      • threat
        • 2.Rd5#
      • 1...Kxe3
        • 2.Rc3#
      • 1...Rxe3
        • 2.Qd7#
      • 1...Sdxe3
        • 2.Qa1#
      • 1...Sgxe3
        • 2.Qg7#
      • 1...fxe3
        • 2.Qa4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 4
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • R(d);SBLOCK,XS(B)::QAR2(F)
    • S(a);N_GUARD,SBLOCK,XS(B)::QAB(F)
    • S(i);N_GUARD,SBLOCK,XS(B)::QAB1(F)
    • P(h);SBLOCK,XS(B)::QAR2(F)
  • Tries
    • Try
      • S(B);XS(a)
      • Threat
        • DUALS(3)
      • Vars
        • R(c);XP(A)::QAR2(F)
        • R(d);XS(C)::QAR2(F)
        • R(d);::QAR2(F)
      • Refutation
        • R(c);XS(B)
    • Try
      • S(B);XS(i)
      • Threat
        • DUALS(3)
      • Vars
        • R(c);XP(A)::QAR2(F)
        • R(d);XS(C)::QAR2(F)
        • P(h);::QAR2(F)
      • Refutation
        • P(j);XS(B)
    • Try
      • Q(F);
      • Threat
        • QAB(F)+R(D),DCHECK
      • Vars
        • K(g);S_FLIGHT,XS(B)::QAB(F)+R(D),DCHECK
        • R(d);SBLOCK,XS(B)::QAR(F)
        • S(a);N_GUARD,SBLOCK,XS(B)::QAB(F)
        • P(h);SBLOCK,XS(B)::QAR2(F)
      • Refutation
        • S(i);XS(B)
  • Actual
    • Q(F);
    • Threat
      • QAB(F)+R(D),DCHECK
    • Vars
      • K(g);S_FLIGHT,XS(B)::QAB(F)+R(D),DCHECK
      • R(d);SBLOCK,XS(B)::QAR(F)
      • S(a);N_GUARD,SBLOCK,XS(B)::QAB(F)
      • S(i);N_GUARD,SBLOCK,XS(B)::QAB(F)
      • P(h);SBLOCK,XS(B)::QAR(F)
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